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A118409 Unsigned row sums of triangle A118407. 2
1, 1, 3, 5, 5, 7, 11, 17, 21, 27, 47, 73, 85, 111, 187, 289, 341, 443, 751, 1161, 1365, 1775, 3003, 4641, 5461, 7099, 12015, 18569, 21845, 28399, 48059, 74273, 87381, 113595, 192239, 297097, 349525, 454383, 768955, 1188385, 1398101, 1817531 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,3

LINKS

Table of n, a(n) for n=0..41.

FORMULA

G.f.: (1+2*x^2+2*x^3-3*x^4+2*x^5-2*x^6)/(1+x^4)/(1-4*x^4)/(1-x).

PROG

(PARI) {a(n)=polcoeff((1+2*x^2+2*x^3-3*x^4+2*x^5-2*x^6)/(1+x^4)/(1-4*x^4)/(1-x+x*O(x^n)), n)}

CROSSREFS

Cf. A118407 (triangle), A118408 (row sums).

Sequence in context: A272882 A077800 A073340 * A162779 A158284 A090941

Adjacent sequences:  A118406 A118407 A118408 * A118410 A118411 A118412

KEYWORD

nonn

AUTHOR

Paul D. Hanna, Apr 27 2006

STATUS

approved

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Last modified April 14 04:41 EDT 2021. Contains 342941 sequences. (Running on oeis4.)